A kind of computer tetris game. This product includes 2 the most popular variations of tetris game: Tetris and Pentix (more complicated and more interesting kind of tetris game) and 6 different Block Sets (Blocks, Numerals, Kinetics,Dice, Wild and Planes). This game contains perfect sound effects, which will not disturb you and help to relax playing S-Tetris'99. If you want, you can use your own sound effects.Outstanding graphic is one more advantage, which will bring you to the world of pleasure and fun, to the world of S-Tetris'99. Background picture can be also changed to yours one.